GSAKMP Rekey Event Types

This type MUST be implemented.
In this case, the size of the Rekey
Event Data field will be zero bytes
long. The purpose of a Rekey Event
Payload with type None is when it is
necessary to send out a new token
with no rekey information. GSAKMP
Rekey Msg requires a Rekey Event
Payload, and in this instance it
would have rekey data of type None.